/**
 *Given a string containing just the characters '(', ')', '{', '}', '[' and ']',determine if the input string is valid.
 *The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" and "([)]" are not. 
 */
/**
 * @author Ivan
 *
 */
package problem20_Valid_Parentheses;